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What is the most important information I should know about Zovirax?• Take this medication for the entire length of time prescribed by your doctor. Your symptoms may get better before the infection is completely treated.• Treatment with Zovirax should be started as soon as possible after the first appearance of symptoms (such as tingling, burning, blisters).• Herpes infections are contagious and you can infect other people, even while you are being treated with Zovirax. Avoid letting infected areas come into contact with other people. Avoid touching an infected area and then touching your eyes. Wash your hands frequently to prevent passing the infection to others.What is Zovirax?• Zovirax is an antiviral drug. It slows the growth and spread of the herpes virus so that the body can fight off the infection. Zovirax will not cure herpes, but it can lessen the symptoms of the infections.• Zovirax is used to treat infections caused by herpes viruses. Illnesses caused by herpes viruses include genital herpes, cold sores, shingles, and chicken pox.• Zovirax may also be used for purposes other than those listed in this medication guide.What should I discuss with my healthcare provider before taking Zovirax?• Do not take Zovirax without if you are allergic to valZovirax (Valtrex).• Before taking Zovirax, tell your doctor if you have kidney disease. You may need a dosage adjustment or special tests during treatment.• FDA pregnancy category B. This medication is not expected to be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment.• Zovirax passes into breast milk and may harm a nursing infant. Do not take this medication without telling your doctor if you are breast-feeding a baby.How should I take Zovirax?• Take this medication exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor.• Treatment with Zovirax should be started as soon as possible after the first appearance of symptoms (such as tingling, burning, blisters).• Take each dose with a full glass of water. Drink plenty of water while you are taking Zovirax to keep your kidneys working properly.• Zovirax can be taken with or without food. Taking Zovirax with food may decrease stomach upset.• Shake the oral suspension (liquid) well just before you measure a dose. To be sure you get the correct dose, measure the liquid with a marked measuring spoon or medicine cup, not with a regular table spoon. If you do not have a dose-measuring device, ask your pharmacist for one.• Take this medication for the entire length of time prescribed by your doctor. Your symptoms may get better before the infection is completely treated. Zovirax will not treat a viral infection such as the common cold or flu.• Lesions caused by herpes viruses should be kept as clean and dry as possible. Wearing loose clothing may help to prevent irritation of the lesions.• Store Zovirax at room temperature away from moisture and heat.What happens if I miss a dose?• Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at the next regularly scheduled time. Do not take extra medicine to make up the missed dose.What happens if I overdose?• Seek emergency medical attention if you think you have used too much of this medicine.• Symptoms of an Zovirax overdose may include seizure (convulsions), hallucinations, and urinating less than usual or not at all.What should I avoid while taking Zovirax?• Herpes infections are contagious and you can infect other people, even while you are being treated with Zovirax. Avoid letting infected areas come into contact with other people. Avoid touching an infected area and then touching your eyes. Wash your hands frequently to prevent passing the infection to others.• Zovirax will not prevent the spread of genital herpes. Avoid sexual intercourse or use a latex condom to prevent spreading the virus to others.What are the possible side effects of Zovirax?• Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.• Stop using Zovirax and call your doctor at once if you have any of these serious sideo urinating less than usual or not at all;o easy bruising or bleeding;o unusual weakness.• Continue using Zovirax and talk with your doctor if you have any of these less serious side effects:o nausea, vomiting, diarrhea, loss of appetite, stomach pain;o headache, feeling light-headed; oro swelling in your hands or feet.• Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.What other drugs will affect Zovirax?• Before taking Zovirax, tell your doctor if you are also taking probenecid (Benemid). If you are using probenecid, you may not be able to use Zovirax, or you may need dosage adjustments or special tests during treatment.• There may be other drugs that can affect Zovirax. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.